Disclosed is a disposable wearing article which can effectively prevent lateral leakage of body exudates by planarly fitting an outer flap positioned laterally outside of an absorbent core included in an absorbent panel on the body of a wearer with the outer flap pulled laterally outside of the article. In the article, the absorbent panel includes the absorbent core extending to front and rear waist regions centering on a crotch region and a pair of outer flaps extending laterally outside of the absorbent core. At least the front waist region of the front and rear waist regions includes a waist elastic area which is elastically contractible in the lateral direction and a pair of elastic strips which is elastically contractible, and the elastic strips each have an outer fixing end fixed on the body facing surface of the chassis.